Journal of Northeast Normal University(Natural Science Edition) 2012 Issue 3 Realization of the 20 kinds of non-Q obit structures of lienard systems without closed orbit

Realization of the 20 kinds of non-Q obit structures of lienard systems without closed orbit
LI Xiao-yue;WANG Ke

..............page:1-8

Existence of multiple positive periodic solutions for two-patch diffusive predator-prey system with harvesting and Holling Ⅱ type functional response
WEI Feng-ying

..............page:9-14

Boundedness of Marcinkiewicz integral in Morrey-Herz spaces with non-doubling measures
ZHAO Kai;WANG Yong-gang

..............page:15-19

Schwarz's boundary value problem for K- complex harmonic function
ZHANG Jian-yuan;LIU Jun;ZHANG Yi-min;ZHANG Xin

..............page:20-26

A new method of strong stabilization
XIE Jia-ning;WANG Rui-ting

..............page:27-30

A continuous method for solving nonconvex optimization problem
SHU Hong-liang;ZHANG Chun-yang

..............page:31-34

Adjoint semi-rings of IS-algebras
YANG Wen-qi

..............page:46-51

The corresponding relationship of ideal and congruence in quantale
ZHAO Ye;WANG Chang

..............page:52-54

Two hybrid DY-CD conjugate gradient methods for unconstrained optimization
XU Chun-ling;SUN Zhong-bo

..............page:35-40

Construction of a class of three-layered feedforward polygonal fuzzy neural network
LI Dan;SUN Gang;WANG Gui-jun

..............page:55-59

Global GMERR algorithm for linear systems with multiple right-hand sides
ZHENG Yu-hui;CHENG Dong-xu;QIAN Xiao-hui

..............page:41-45

Recognition of license plate Chinese character based on combined character feature and BP neural network
LIU Yan-hong;GAO Li-qing;WANG Lian-ming

..............page:60-64

Quantum decoherence in system of two atom-two dissipative cavity
ZHANG Yue;WANG Lei;JIANG Wen-ying;ZHENG Li;PAN Shu-mei;ZHENG Tai-yu

..............page:65-68

Investigations on polarization offset of temperature-graded ferroelectric thin films
CHEN Hui;CHENG Tai-min;CHEN Si-qun

..............page:69-73

Study of high voltage generator based on the BOOST of circuit
QIAO Shuang;ZHANG Yang;ZHANG Chun-hong

..............page:74-77

Improvement of the system's thermalization efficiency for 14 MeV neutrons
CHENG Dao-wen;LI Xiang-long;LAN Min;GU De-shan

..............page:78-81

Synthesis, crystal structure of the novel complex N, N'-dis(2-oxy-acetate-3-methoxyl) benzylethylenediamine with Cu( Ⅱ )
XIAO Yu-fei;WANG Mi-jia;LI Chuan-bi

..............page:82-86

The improvement of processing technique for atrazine synthesized in solvent
QU Xiao-shu;LUAN Jian;L(U) Ling-ling;WANG Ya-hong

..............page:87-90

Theoretical studies of the mechanism on the reaction CO,NO radicals with OXO (X=Cl,Br) radicals
HUANG Xian-li;LI Yue;ZHANG Hui

..............page:91-94

A quantum chemistry study on the ring-opening reaction mechanism of methyloxirane in HCl solutions
WANG Nong;WANG Xing-quan;YANG Li-juan;CHEN Li-xuan;LI Wen-tao

..............page:95-100

First-principles study on electronic structures and optical properties of MgF2 codoped with febalt and nitrogen
WANG Xia;LI Zong-bao;XIE Quan;DENG Ming-sen

..............page:101-106

The fumigation action of plant essential oil mixed with ethyl formate on Sitophilus zeamais adults
WANG Xue-song;YUAN Hai-bin;MA Li-bin;YANG Cui-hua;REN Bing-zhong

..............page:107-111

Spatio-temporal characteristics of chilling damage during May-September over Jilin Province, 1961-2010
MENG Xiang-jun;WU Zheng-fang;DU Hai-bo;FANG Chang-ri

..............page:112-117

Changes of soil organic carbon and complex iron in Momoge Wetland
YU Xiu-li;XU Lin-shu

..............page:118-123

The impact factors of photoconversion of naphthalene in natural water
XUE Hong-hai;SHI Lei;ZHANG Fan;LI Zhe;LI Lin-lin;KANG Chun-li

..............page:124-129

The spatial distribution characteristics of atmospheric mercury in the continuous space of city and countryside from east to west in Jilin Province
ZHANG Gang;WANG Ning;SHENG Lian-xi;WANG Zhan-hua;ZHANG Lei;AI Jian-chao

..............page:130-135

The impact of petroleum exploration on the hydrogeological environment and corresponding control measures in Daqing
LIU Da-ping;LIU Cheng-yu

..............page:136-141

Environment-friendly land-use spatial structure based on ecological sensitivity analysis
HU Hao;WANG Shi-jun;NAN Ying;LU Shu-bing

..............page:142-148

Comparative study of the centrality and diffusion areas between Chinese regional central cities of Shenyang and Wuhan
ZHU Yuan-yuan;ZENG Ju-xin;WANG Shi-jun

..............page:149-156